import keyword

print(keyword.kwlist)

a = 10

print(a)
print(type(a))

# 动态数据类型语言
a = "数加"
print(a)
print(type(a))

# 单行注释

'''
多行注释

'''

"""
多行注释

"""

# sep  分割符
print("数加", "java", "java", sep="\t")

f = 3.14e9
print(f)

print("暑假 \t  '学院")
print('暑假 \t  "学院')

print(r'暑假 \t  "学院')

print(2 > 3)

print(True and False)
print(True or False)
print(True & False)
print(True | False)
print(not False)

n = None

print(type(n))

a = 10
b = 4

print(a + b)
print(a - b)
print(a * b)
print(a / b)
print(a // b)
print(a ** b)
print(a % b)

s = "10"

# 类型转换
i = int(s)

print(type(i))

t = ""

# 只有0和None是false 空的字符串
print(bool(t))

b = 100

# 判断数据类型
print(isinstance(b, int))
